Processing technology for sterilization, deodorization, dehydration and heavy metal removing of sludge

Abstract

The invention discloses a processing technology for sterilization, deodorization, dehydration and heavy metal removing of sludge. The processing technology comprises the following steps: taking concentration sludge with water content of 97-99.5% for pretreatment to obtain the primary sludge with water content of 75-85%; sequentially performing primary sludge pre-reaction, sludge neutralization, microray deodorization and sterilization, mechanical filtering and reclamation utilization processing. The processing technology can perform sludge processing, and can comprehensively process 'four pests' of the sludge, namely, quick sterilization, quick deodorization, depth dehydration and effective heavy metal removing of the sludge. Moreover, the processing process is short, the whole time from the time of sludge entering into a system to the time of the sludge turned into dry sludge and heavy metal slag is 30-150 min. During the processing process, the environment is protected, secondary pollution is avoided, the energy consumption is low and the cost is low, the processing cost of the sludge to be processed per ton is smaller than 100 Yuan, and the obtained dry sludge and heavy metal slag can be turned into the values for comprehensive utilization.

Description

technical field [0001] The invention relates to a sludge treatment process, in particular to a process for sterilizing, deodorizing, dehydrating, and removing heavy metals from sludge. Background technique [0002] After the sewage entering the sewage treatment plant is treated, it meets the standard and is discharged to the outside, but the sludge is left behind. The sludge not only has a high water content, is easily corrupted, emits a strong odor, but also contains a large number of microorganisms and heavy metals. The high water content, strong odor, large amount of harmful microorganisms and heavy metals constitute the "four evils" of sludge, which cause serious harm to the ecological environment. [0003] With the continuous development of my country's economy, the amount of industrial and urban sewage is also increasing, so the amount of sludge produced is also increasing. At present, the development of my country's urban sludge treatment process equipment is serious...

AI Technical Summary

Problems solved by technology

Among them, the sludge incineration treatment method consumes a lot of energy and emits a large amount of harmful gases such as dioxins, causing secondary pollution to the environment; after the concentration method, the water content is still above 75%, and the energy consumption is high, and the bacterial content is high; drying The water content is still as high as 70-80% after the method treatment, and the energy consumption is high

All these sludge treatment methods are to solve one or two of the aforementioned "four pests". Although they are treated, they continue to cause harm.

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